Page 103 - PCMI December 2017 Journal

Material Proper es Of High Performance Precision Strip Steel Jonas Nilsson |R&D Mgr. Precision Strip | Sandvik Materials Technology | SE
11/26/17
INCLUSIONS - BACKGROUND
1 ) Knowledge about relation between metallurgy and presence of inclusions 2 ) Knowledge about inclusion behavior in different applications
Application examples:
Flapper valve steels
Implant material
Exclusive watches
Razor blades/microtome blades with very tough demands on small edge radius
with tough demands on fatigue with extreme cleanness requirements
with extreme surface requirements
INCLUSIONS IN STEEL MEAKING
THREE IMPORTANT ELEMENTS
Element • Sulphur
• Oxygen • Nitrogen
Inclusion
Sulphides
i.e MnS, CaS
Oxides
Solubility
i.e Al2O3, SiO2, MnO
Nitrides
i.e TiN, AlN
N
S
O
TLiq TMeltshop Temp
Issue 130 December 2017 PCMI Journal Page 102
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